FLEXTRON

Get boosted with FLEXTRON. Our footwear technology delivers stability, support, and energy return for smart movement in the mountains.

We know that moment. Your legs feel heavy, footing less secure, but you still have miles left to go. That’s why we developed FLEXTRON and FLEXTRON PRO.

The technology helps to reduce strain on your feet and calves for smoother transitions and lasting comfort – all while keeping your shoes lightweight.

The benefits

Move faster above the treeline
A spring-like plate boosts rebound energy during push-off.
Save your energy for another peak
Less strain on your calves and feet means reduced fatigue and faster recovery.
Stay secure with every step
High side walls and wrapping heel design enhance stability while staying flexible.

Ducan III Low LTH GTX Women

€210

Aenergy Trail Speed Low Men

€190

Alnasca IV Low LTH Women

€200

Ducan III High GTX Men

€230

Aenergy Trail Endurance Ultra Low GTX Women

€144 €240 40%

Alnasca IV Low GTX Men

€180

"Flextron
is
built
to
enhance
your
movement.
It
stabilizes,
adapts,
and
helps
you
go
further
with
no
complaints
from
your
feet."

Lorenza Kessler PRODUCT MANAGER FOOTWEAR

How the technology works

Traditional hiking shoes can cause fatigue, ankle strain, and energy loss when you need it most. FLEXTRON acts like a springboard, boosting rebound energy as you push off, while an innovative shank delivers torsional stability for balance on uneven terrain, and high side walls secure the heel and midfoot. By reducing strain on your calves and feet, you can move more efficiently and recover faster.

Feel the power with FLEXTRON PRO

For maximum energy return when trail running, we developed FLEXTRON PRO. Built for those who like their trails technical and their pace fast, it provides the precise torsional stability needed for confident, high-speed performance.

FLEXTRON PRO stores and releases energy with every step to create explosive toe-off and smooth, responsive propulsion. Tested in collaboration with the Zurich University of Applied Sciences, FLEXTRON PRO showed a measurable reduction in ground contact time and enabled quicker transitions from landing to takeoff.